JP2000027486A - Structure and method for mounting viscous quake damping wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure and method for mounting a viscous quake damping wall that can be manufactured at a low cost. SOLUTION: A side plate made of steel is placed upright on a baseplate 8 and flange plates 11 are placed on both sides thereof to form a casing open at its upper end. To mount a viscous quake resisting wall 1 comprising an inner plate 13 inserted in the casing and a viscous or viscoelastic material held in a gap portion, the flange of a lower-story beam 3 is provided with a baseplate junction and a flange joint plate 7, and the baseplate 8 and the flange plate 11 are joined thereto. An intermediate plate 13 is directly joined to a gusset plate 12 attached to the flange of an upper-story beam 4 to rationalize the dispersion of stresses and to reduce the number of component members. Also, the intermediate plate 13 is joined to the gusset plate 12 and the upper- story beam 4 with which the casing is integrated using temporary hanging pieces is set in a predetermined position. Therefore, handling is easy and shear deformation of the elastic material can be prevented during construction work and the quake resisting wall 1 can be prevented from becoming movable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a viscous damping wall and a mounting method thereof, and more particularly, to an improved mounting structure with a main body structure, which has a simple joining structure, has sufficient strength, and is inexpensive. The present invention relates to a viscous vibration damping wall mounting structure and a mounting method thereof that can be manufactured at a low cost.

[0002]

2. Description of the Related Art In order to improve the seismic safety of a building structure and to improve the dwelling performance of the structure against wind and other dynamic external forces, measures for increasing the damping performance of the structure have long been taken. As a concrete solution, viscous damping walls have been put into practical use, and in recent years, their use has been increasing. The viscous seismic wall is composed of a steel box on the base plate and an open box consisting of a flange plate on each side of the steel box and an open box on the upper floor integrated with the beams on the lower floor. A viscous body or a viscoelastic body is sandwiched between them by a predetermined thickness. In order to incorporate the damping wall into the building, it is necessary to coordinate with the main body structure, but at the present time, the joint metal from the main body structure to be combined with the viscous damping wall includes many rib plates The joint has become complicated,
This was a factor of cost increase.

Referring to FIG. 5, a description will be given of a conventional connection between a viscous damping wall and a main body structure. A base plate 32 of a box body 31 constituting a damping wall 30 is a raised metal member provided on a lower beam 33. 34 bolted to the flange surface,
The top plate 36 was welded to the tip of the middle plate 35 of the vibration control wall, and was bolted to the flange surface of the mounting hardware 38 provided on the upper beam 37. In this state, when the damping wall 30 bears a horizontal force due to an external force, a bending moment is generated in the top plate 36 and the base plate 32 at the upper and lower ends by the shearing force. The stress acting on the joint acts as a shear force in the horizontal direction on the bolt on the joint surface, and at the same time, the bending moment causes the bolt on the joint surface to have a large axial distribution at the edge of the damping wall 30. Forces arise. As a result, a large bending stress is generated in the top plate 36 and the base plate 32 having the horizontally arranged bolt holes, and corresponding treatment is required for each plate.

As a result, as shown in the figure, a large number of vertical rib plates 39 and 40 are installed on the base plate 32, the top plate 36, the corresponding raised hardware 34 and the mounting hardware 38, and in particular, the damping wall is provided. A great deal of reinforcement has been applied to the edge portion of the device, which has led to a huge increase in cost, as well as interference with members orthogonal to the beam and obstacles to the equipment sleeve through-hole. Since the damping performance that can be added to the structure is proportional to the number of damping walls to be arranged, it is desirable to adopt a large number of them, but the cost required for equipment is also proportional to the number of used damping walls. It is an important issue to reduce the impact on other construction work.

[0005] In order to solve this problem, there has been proposed a construction method in which all upper and lower flange portions are removed.
In this proposal, as shown in the figure, a bolt fixing steel plate having the same thickness as the inner steel plate 51 of the damping wall 50 to be fixed below the upper floor beam or a portion reinforced with the same is shown. 52, a steel plate 51 on the inner wall of the vibration damping wall is disposed immediately below, and auxiliary plates 53, 53 for bolt fixing are disposed on both surfaces thereof, and the three steel plates are fastened with high-strength bolts 54 to be integrated. On the lower floor side, a lower steel plate 56 for bolt fixing is welded under the steel plate 55 on the outer wall of the vibration control wall, and a steel plate 57 having the same thickness as the lower steel plate 56 for bolt fixing is formed on the lower floor beam. It is provided and integrated like the upper side. As described above, by eliminating the flange connection at each of the upper and lower parts, the stress transmission mechanism can be rationalized, and at the same time, the manufacturing and fixing of the damping wall itself can be simplified, greatly reducing the cost required for the entire damping wall construction method. Claims that it can be reduced.

However, in the proposed damping wall, a lower steel plate for fixing bolts is specially provided on the damping wall itself, and an upper reinforcing portion is provided on the inner wall steel plate. Also employs a structure in which a number of bolts are arranged on the end side of the damping wall. These configurations are a natural result of the requirement that the lower steel plate for bolt fixing and the steel plate for the inner wall need to simultaneously withstand both shearing force and tensile force against the bending moment generated on the damping wall. The steel plate will also have a considerable thickness, and the cost of the damping wall itself will not be much different from the conventional one. Also, regarding the handling of the damping wall, since it is a structure that cannot be self-sustained, special considerations are required in terms of safety and workability in each situation of transport, storage and on-site setting.

[0007]

An object of the present invention is to improve a joining structure for attaching a viscous vibration damping wall to a main body structure so that the viscous vibration damping member can be manufactured at a low cost while having a simple and sufficient strength. A wall mounting structure and a mounting method thereof are provided.

[0008]

The mounting structure of the viscous vibration damping wall according to the present invention is basically a box having a steel side plate on a base plate and flange plates arranged on both sides thereof to open an upper end. To attach a viscous damping wall constructed by inserting a middle plate into a box and inserting a viscous or visco-elastic material in the gap, attach the base plate joint hole and flange to the flange of the lower beam It is characterized by providing a plate, joining the base plate and the flange plate to this, and directly joining the middle plate to the gusset plate attached to the flange of the upper floor beam, specifically, raising the height to the flange of the lower floor beam A metal is installed, a base plate joint hole and a flange joint plate are provided, and the joint between the flange plate and the flange joint plate is a high-strength bolt one surface friction joint, Direct bonding between the plate and the gusset plate is characterized in that a high-strength bolts dihedral friction bonding using high-strength bolts one surface friction joint or splice plates. The above structure eliminates the need for the top plate, brackets, and reinforcing rib plates of each part used in the damping wall construction method, reduces the thickness of the base plate and the number of bolts, and stabilizes construction because it is self-supporting and stable. And workability are improved.

Further, the method of mounting a viscous vibration damping wall according to the present invention is a method of mounting a lower floor beam having a base plate connecting hole and a flange connecting plate, and then bonding the lower beam to a gusset plate having an intermediate plate and a box body. The upper floor beam integrating the viscous damping wall with the temporary suspension piece is set at a predetermined position, and the base plate and the flange plate are friction-bonded to the base plate connection hole and the flange connection plate of the lower floor beam with high-strength bolts. The feature is that the temporary suspension pieces are removed from, so that it is easy to handle, can prevent shear deformation of viscous materials, and also prevents mobilization of the damping wall.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an elevation view and a cross-sectional view taken along an arrow in a state where a viscous vibration control wall according to the present invention is attached to a main body structure. The viscous damping wall 1 is disposed in a structure 5 composed of columns 2 and 2, a lower girder 3 and an upper girder 4, and is joined to the lower girder 3 and the upper girder 4, respectively. ing. The viscous vibration control wall 1 may be directly mounted on the lower girder 3 having the base plate joint hole and the flange joint plate, but in this embodiment, a raised metal is provided for the reason described later. I will explain with A flange joining plate 7 is welded to the raised hardware 6 welded to the flange surface of the lower girder 3, and is integrated with the lower girder 3. The use of the raised hardware 6 does not damage the base material of the lower girder 3 with bolt holes or the like, and the work surface of the high-strength bolted friction joining of the viscous vibration control wall 1 is on a floor slab. When the need to replace the viscous vibration control wall 1 is required, the replacement work can be facilitated. The distance between the flange connection plates 7 is slightly larger than the outer width of the viscous damping wall 1.
The gap can be adjusted at the time of installation at the site.

The viscous vibration damping wall 1 is placed on the raised hardware 6, and the base plate 8 of the viscous vibration damping wall and the base plate joining hole 9 of the raised hardware 6 are frictionally joined on one surface by high-strength bolts 10. Similarly, the viscous damping wall 1 and the lower girder 3 are integrally joined by frictionally connecting the flange plate 11 and the flange joining plate 7 on both sides of the viscous damping wall with a high-strength bolt 10 on one surface. I have. Flange joint plate 7
Utilizing the fact that the bending moment generated by the shear force that the viscous vibration control wall 1 bears during an earthquake becomes a vertical force at the flange plates 11 on both sides of the viscous vibration control wall, This is treated as the shearing force of the force bolt, and the damping of the lifting force of the base plate and the vertical force generated largely at the edge of the viscous damping wall is suppressed.
Accordingly, although the base plate 8 of the viscous vibration control wall 1 and the base plate connecting hole 9 of the raised hardware 6 are of the same base plate type as the conventional one, unlike the conventional viscous control wall, the connecting bolt 9 is pulled by the connecting bolt. Since no force is generated, there is no need for a reinforcing rib plate, and a simple joining state with a small thickness is formed.

A gusset plate 12 is attached to the lower flange surface of the upper girder 4 by welding in the same row as the web of the girder. The middle plate 13 of the viscous vibration control wall 1 is connected to the gusset plate 12 for direct joining with the gusset plate 12.
With two splice plates 14 and frictionally bonded on two sides with high-strength bolts 10, and the viscous damping wall 1
The upper beam 4 is thereby integrally joined. Since the direct joining between the gusset plate 12 and the middle plate 13 is to remove the top plate provided on the conventional middle plate and the bracket suspended from the upper girder, the height of the viscous vibration control wall is increased. It is possible to improve the damping performance by increasing the shear area of the viscous damping material. At both ends of the gusset plate 12, flange plates having screw holes for attaching a temporary hanging piece described later are provided in the direction orthogonal to the beam web of the upper floor girder.

FIG. 2 is a perspective view of the viscous vibration control wall. As shown in the figure, the viscous vibration control wall 1 is provided with a steel side plate 15 standing on a base plate 8 and flange plates 11 arranged on both sides thereof to form a box 16 having an open upper end. The middle plate 13 is inserted in the first position. A viscous body or a viscoelastic body is interposed between the box 16 and the middle plate 13 so as to attenuate a horizontal force applied from the outside between the base plate 8 and the middle plate 13. . The base plate method is stable and self-supporting during transportation, storage, and on-site setting, improving construction safety and facilitating on-site work.

The appearance of the base plate 8 does not differ from the conventional viscous damping wall in appearance, but as described above,
Since it is not necessary to withstand a vertical force, there is no need to provide a reinforcing rib plate, and the plate has a simple shape requiring only a small thickness. The base plate 8 and the flange plate 11 are provided with base plate joint holes provided in the raised metal and bolt holes 17 and 18 for high-strength bolts for one-side frictional joint with the flange joint plate.
3 is provided with a bolt hole 19 for a high-strength bolt for performing two-surface frictional bonding with the splice plate 14 when directly bonding with the gusset plate 12.

FIG. 3 shows an embodiment in which the middle plate and the gusset plate are joined. In the present embodiment, the gusset plate 12 and the middle plate 13 are directly joined.
That is, the gusset plate 12 and the middle plate 13 are sandwiched between two splice plates 14, and the splice plate 1
The high-strength bolts 10 arranged in parallel with each other are used to perform two-surface friction welding, so that the viscous damping wall 1 and the upper girder 4 are integrally joined. .

The direct joining of the gusset plate 12 and the middle plate 13 does not necessarily require a splice plate, and the welding position of the gusset plate is adjusted so that the center of the web of the upper beam and the center of the middle plate match. Is shifted from the web core of the upper floor girders, the gusset plate 12 and the intermediate plate 13 can be directly joined to each other to perform one-surface friction joining with high-strength bolts. The adoption of this one-sided friction joining contributes to cost reduction because the use of a splice plate is eliminated.

FIG. 4 shows another embodiment for joining the middle plate and the gusset plate. In this example, there is no special change in the middle plate, but it is different in that the splice plate is divided into a central portion 20 and side portions 21 and 21. Bolt holes are arranged in a row in the central portion 20 of the splice plate, and the splice plates 21 and
In FIG. 1, two rows of bolt holes are arranged in the upper and lower rows to cope with the shearing stress to be shared. Splitting the splice plate is not only rational for stress sharing, but also has the effect of being able to flexibly cope with misalignment between the gusset plate and the middle plate due to the accuracy of construction at the site. Since it is possible to reduce the weight, it is possible to exert the convenience of being able to work sufficiently with the manual labor of the operator without using any special heavy equipment or device.

FIG. 5 is an exploded view for explaining a method of mounting a viscous vibration control wall according to the present invention. Installation work,
The process starts by attaching the lower girder 3 to which the raised hardware 6 is welded and integrated into a column not shown in the drawing. At this time, the flange joining plates 7 at both ends of the raised metal 6
Is provided with a filler plate 22 for gap adjustment in advance.

On the other hand, the temporary suspension pieces 23
, And the gusset plate 12 and the middle plate 13 are directly joined by high-strength bolt two-surface friction welding using a splice plate 14. The direct joining of the high-strength one-surface friction joining without using the splice spray tooth plate is as described above. Upper girder 4 integrated with viscous damping wall 1
Is lifted and set at a predetermined position. By using the temporary suspension piece 23, it is possible to prevent the viscous material from being sheared and deformed by the weight of the viscous damping wall, and the viscous damping wall is movable. It is fixed so as not to be in a state, and rotation around the beam axis during suspension can be suppressed.

In order to install the viscous vibration control wall 1 between the flange connection plates 7, suspension is performed.
At this time, the filler plate 22 that has been attached in advance is taken in and out, and the gap and the like are adjusted so that the viscous vibration control wall is easily fitted between the flange joining plates. When the positioning is completed, high-strength bolt one-surface friction welding is performed between the base plate 8 and the base plate joining hole 9 and between the flange plate 11 and the flange joining plate 7 to complete the installation of the viscous vibration control wall 1 to the main body structure. I do. At this stage, when the above-mentioned temporary suspension piece 23 is removed, the viscous vibration control wall 1 is in a movable state capable of exhibiting the original vibration control function, and the construction is completed.

FIG. 6 is an elevation view of a state in which the viscous vibration control walls according to the present invention are arranged in parallel. Viscous damping wall 1, 1
Are arranged in parallel in a construction surface 5 composed of the pillars 2, 2, the lower girder 3 and the upper girder 4, and are integrally joined to the lower girder 3 and the upper girder 4. I have. The raised hardware 6 welded to the flange surface of the lower girder 3 is integrated with the lower girder 3 in such a length that the two viscous damping walls 1, 1 can be placed, and the flange joining plate 7 is As in the example of FIG. 1, they are attached to both ends of the raised hardware 6.

The viscous vibration damping walls 1 and 1 are connected by a high-strength bolt 1 between the flange plates 11 and 11 on one side facing each other.
At 0, frictional bonding is performed on one surface, and is placed on the raised hardware 6 in an integrated state. The viscous damping walls 1 and 1 are friction-bonded to each base plate 8 and the base plate joint hole 9 of the raised metal piece 6 with high-strength bolts 10 on one surface, and are flange-joined to the flange plates 11 on both sides of the viscous damping wall. The plate 7 is integrally joined to the lower girder 3 by frictionally joining the plate 7 with the high-strength bolt 10 on one surface. The flange joint plate 7 receives the bending moment due to the shear force that the integrally joined viscous vibration control walls 1 and 1 bear during an earthquake as the shear force of the high-strength bolt, thereby lifting the base plate and viscous vibration control. It handles the vertical forces generated at the edge of the wall.

Two gusset plates are attached to the lower flange surface of the upper girder 4 in the same row as the web of the girder in the same manner as in the above example. The middle plate of each viscous control wall 1
Two splice plates 14 with gusset plates
The two high-strength bolts are friction-welded with each other, and the viscous damping walls 1 and 1 and the upper girder 4 are integrally joined by this. As described above, the mounting structure of the viscous damping wall according to the present invention is not limited to the mounting of a single viscous damping wall, but may be applied to a case where a plurality of viscous damping walls are installed in parallel. Applicable. The viscous damping wall to be juxtaposed
Any number of flange plates that face each other can be treated as a single viscous damping wall by friction-bonding the flange plates on the side facing each other with a high-strength bolt on one surface. By simply attaching the piece to the outer flange plate, integration with the upper girder can be ensured.

[0024]

The mounting structure of the viscous vibration damping wall according to the present invention is a box having an upper end opened by setting up a steel side plate on a base plate and arranging flange plates on both sides thereof. A base plate and a flange plate are provided by installing a base plate joint hole and a flange joint plate in the flange of the lower floor beam to attach a viscous damping wall constructed by inserting a middle plate and inserting a viscous or viscoelastic material in the gap. And the middle plate is directly connected to the gusset plate attached to the flange of the upper beam, so that the top plate, brackets, and reinforcing ribs of each part used for the damping wall construction method It eliminates the need for a plate, reduces the thickness of the base plate and the number of bolts, and has the effect of reducing costs. The effect of improving the safety and workability of things can also be exhibited. Further, the method of mounting the viscous vibration damping wall according to the present invention is as follows. It is characterized by setting the base plate and the flange plate to the base plate joint hole of the lower floor beam and the flange joint plate by high-strength bolt friction, and then removing the temporary suspension piece. This has the effect of preventing shear deformation of the slab, and also preventing mobilization of the damping wall.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a viscous vibration control wall according to the present invention is attached to a main body structure.

FIG. 2 is a perspective view of a viscous vibration control wall according to the present invention.

FIG. 3 is a diagram showing the installation state of the viscous damping wall on the upper beam.

FIG. 4 is a diagram showing an installation state of another viscous vibration control wall to an upper floor girder.

FIG. 5 is an exploded view of the installation of the viscous damping wall according to the present invention.

FIG. 6 is a mounting state diagram in which a plurality of viscous vibration control walls are juxtaposed to a main body structure according to the present invention.

FIG. 7 is a mounting state diagram of a conventional viscous vibration control wall.

FIG. 8 is a diagram showing another conventional viscous vibration control wall installation state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Viscous damping wall 5 Construction surface 6 Raising hardware 7 Flange joining plate 8 Base plate 9 Base plate joining hole 10 High strength bolt 50 Damping wall 11 Flange plate 51 Inner steel plate 12 Gusset plate 52 Bolt fixing steel plate 13 Middle plate 53 Bolt fixing Attachment plate 14 Splice plate 54 High-strength bolt 15 Constitution side plate 55 Steel plate for outer wall of vibration damping wall 16 Box 56 Lower steel plate for bolt fixing 17, 18, 19 High-strength bolt hole 57 Steel plate 20 Splice plate central part 21 Splice plate side part 22 Filler plate 23 Temporary suspension piece 30 Damping wall 31 Box body 32 Base plate 33 Lower girder 34 Raising hardware 35 Middle plate 36 Top plate 37 Upper girder 38 Mounting hardware 39, 40 Rib plate

Claims (8)

[Claims] A steel plate is provided on a base plate, and a flange plate is arranged on both sides of the base plate to form a box having an open upper end. A middle plate is inserted into the box, and a viscous material or A mounting structure of a viscous damping wall configured by sandwiching a viscoelastic body, wherein the base plate and the flange plate are joined to a base plate joining hole and a flange joining plate provided on a flange of a lower beam, and the upper A mounting structure for a viscous vibration control wall, wherein the middle plate is directly joined to a gusset plate mounted on a flange. 2. The mounting structure for a viscous vibration damping wall according to claim 1, wherein a raised metal is installed on a flange of the lower floor beam, and a base plate connecting hole and a flange connecting plate are provided. 3. The mounting structure for a viscous vibration control wall according to claim 1, wherein the joining between the flange plate and the flange joining plate is a high-strength bolt one-surface friction joining. 4. The mounting structure for a viscous vibration control wall according to claim 1, wherein a filler plate is interposed between the flange joining plate and the flange joining plate. 5. The mounting structure for a viscous vibration control wall according to claim 1, wherein the direct connection between the middle plate and the gusset plate is a high-strength bolt one-surface friction connection. 6. The mounting structure according to claim 1, wherein the direct joining between the middle plate and the gusset plate is a high-strength bolt two-surface friction joining using a splice plate. 7. The mounting structure for a viscous vibration control wall according to claim 6, wherein the splice plate is divided into a center portion and an edge portion. 8. A lower beam having a base plate joint hole and a flange joint plate is attached, and then joined to a gusset plate having a middle plate, and the box body is integrated with a viscous vibration control wall with a temporary suspension piece. Setting the upper floor beam in place at a predetermined position, frictionally connecting the base plate and the flange plate to the base plate connection hole and the flange connection plate of the lower floor beam, and then removing the temporary suspension piece. Item 7. An installation method applied to the installation structure for a viscous vibration control wall according to any one of Items 1 to 7.